Keeping constant water pressure available for use
Keeping constant water pressure available for use
(OP)
Hi,
I have some mini-greenhouse structures in which the humidity is controlled by atomizing misters. The misters operate by positive air and positive water pressure. Air and water solenoids open and close as needed to maintain a set point. Our air is supplied by an air compressor, which works just fine at maintaining a constant 50 psi or so. Our water supply, however, comes from a well that is shared by other facilities. So, depending on the demand at the time, our water supply pressure will vary between 25 and 75 psi. I would like to maintain 50 psi. I know I could install a holding tank and use a pump with a regulator, but I was hoping for something simpler. Can I use a booster pump continuously, and have it recirculate exess water back into the inlet? If not, what ideas would you have?
Thanks!
Sam
I have some mini-greenhouse structures in which the humidity is controlled by atomizing misters. The misters operate by positive air and positive water pressure. Air and water solenoids open and close as needed to maintain a set point. Our air is supplied by an air compressor, which works just fine at maintaining a constant 50 psi or so. Our water supply, however, comes from a well that is shared by other facilities. So, depending on the demand at the time, our water supply pressure will vary between 25 and 75 psi. I would like to maintain 50 psi. I know I could install a holding tank and use a pump with a regulator, but I was hoping for something simpler. Can I use a booster pump continuously, and have it recirculate exess water back into the inlet? If not, what ideas would you have?
Thanks!
Sam





RE: Keeping constant water pressure available for use
Ted
RE: Keeping constant water pressure available for use
Or size a booster pump for max required flowrate and recirculate excess back to inlet. May cause overheating when recirculating high flowrates, if the suction line is small, in which case you should recirculate back to a tank, or shut the pump off.
If you use a tank, you wouldn't have to regulate the pump discharge based on the widely varying suction pressure you have now. You could probably then select a pump to give you the exact head needed by the misters and you might not need a discharge regulator. With the suction pressure varying as it is now, a discharge pressure regulator is more than likely required to keep your flowrate reasonably within margin.
The tank will probably be the most economic solution over the long run.
From "BigInch's Extremely simple theory of everything."
RE: Keeping constant water pressure available for use
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RE: Keeping constant water pressure available for use
From "BigInch's Extremely simple theory of everything."
RE: Keeping constant water pressure available for use
RE: Keeping constant water pressure available for use
Sam
RE: Keeping constant water pressure available for use
If you want to maintain a constant pressure you will need a variable speed pump.
This is the same scenario that most high rise building designers must consider when designing the water plumbing. How to control the water pressure in multiple floor levels. Installation of booster pump sets consisting of variable speed pumps that draw water directly from the public water main is usually required.
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Note that if you are drawing water from a public source, you need permission to repump.
Look for a pump manufacturer that makes a combination variable speed controller and pump.
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http://www.pumpshop.com/variablespeed/aquavar.html
RE: Keeping constant water pressure available for use
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Keeping constant water pressure available for use
RE: Keeping constant water pressure available for use
If supply pressure only drops for short periods, a small pressure tank with a check valve can be charged when your supply pressure is high and maintain pressure during the drops. Misters use little water.
RE: Keeping constant water pressure available for use
Thanks again,
Sam
RE: Keeping constant water pressure available for use
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